SoC FPGA implementation of energy based cooperative spectrum sensing algorithm for Cognitive Radio

Spectrum sensing is an important aspect for Cognitive Radio Networks (CRNs) to enable efficient usage of the licensed spectrum bands when the primary users are inactive. For real time application, rapid detection of spectrum holes are of prime importance. In this paper, Finite State Machine (FSM) based SoC architecture design for energy based single and cooperative spectrum sensing techniques have been proposed. Next, the proposed architectures are implemented completely using Verilog Hardware Description language (HDL) only in Xilinx Virtex-IV (XC4VLX25) FPGA board. Finally, the overall implementation of the proposed architectures are tested using FPGA in Loop (FIL) based test environment.